{
  "id": "khufu-big-void-2017",
  "title": "Khufu’s pyramid: what muons reveal and what they do not",
  "country": "Egypt",
  "category": "objet",
  "date": "2017-11-02",
  "date_label": "November 2017 research announcement; the space itself is ancient",
  "location": "Great Pyramid, Giza",
  "lat": 29.979,
  "lng": 31.134,
  "summary": "Muon observations identified a substantial low-density space in the Great Pyramid. Its geometry and function require different evidence from the detection itself.",
  "sources": [
    {
      "id": "P1",
      "title": "Nature — discovery of a big void in Khufu’s pyramid",
      "url": "https://www.nature.com/articles/nature24647",
      "language": "en",
      "note": "Original research; detection should be separated from interpretation of function.",
      "kind": "Source record · see provenance note"
    }
  ],
  "author": "Eklipsis",
  "content_languages": [
    "en"
  ],
  "path": "/investigations/khufu-big-void-2017",
  "source_url": "https://www.nature.com/articles/nature24647",
  "location_source_url": "https://www.openstreetmap.org/?mlat=29.979&mlon=31.134#map=8/29.979/31.134",
  "location_precision": "region",
  "location_note": "Approximate orientation marker for the named place or institution; not a surveyed observation point, protected excavation coordinate or recommended access route.",
  "reviewed_on": "2026-09-30",
  "edition": 1,
  "truth_type": "unknown",
  "verdict": "The selected research supports a physical density finding. Its purpose remains a separate archaeological question. No alien technology, secret treasure or previously unseen inscription is demonstrated by the measurement.",
  "sections": [
    {
      "title": "Documented account",
      "text": "The ScanPyramids research published in Nature reports a large void identified using cosmic-ray muons. Several detector approaches supported the observation. A density anomaly can identify a space or set of spaces; it does not automatically establish a decorated room, contents, an entrance or a ceremonial purpose.",
      "refs": [
        "P1"
      ]
    },
    {
      "title": "Evidence and its limits",
      "text": "The marker identifies the monument, not a public route into the space. Do not transform a diagram of muon transmission into a photograph of a chamber interior. Instrumental confidence in detecting lower density and uncertainty about architectural function can coexist.",
      "refs": []
    },
    {
      "title": "Inspector’s assessment",
      "text": "The selected research supports a physical density finding. Its purpose remains a separate archaeological question. No alien technology, secret treasure or previously unseen inscription is demonstrated by the measurement.",
      "refs": []
    },
    {
      "title": "A reproducible next investigation",
      "text": "Read the detector geometries and controls before interpreting a visual reconstruction. Separate measured paths from modelled boundaries. Compare structural explanations with established architecture, and mark any proposed access route or contents as unknown unless a later direct observation documents them.",
      "refs": []
    }
  ],
  "timeline": [
    {
      "date": "Ancient construction",
      "text": "The monument predates the modern detector experiment.",
      "refs": [
        "P1"
      ]
    },
    {
      "date": "2017 measurement programme",
      "text": "Muon observations provide the basis for the reported finding.",
      "refs": [
        "P1"
      ]
    },
    {
      "date": "November 2017",
      "text": "The research is published in Nature.",
      "refs": [
        "P1"
      ]
    },
    {
      "date": "30 September 2026",
      "text": "Eklipsis prepares this source-linked documentary synthesis. This is editorial review, not historical fieldwork.",
      "refs": []
    }
  ],
  "claims": [
    {
      "text": "Muon observations identified a substantial low-density space in the Great Pyramid. Its geometry and function require different evidence from the detection itself.",
      "status": "Documented subject; interpretations qualified in the dossier",
      "refs": [
        "P1"
      ]
    },
    {
      "text": "The selected research supports a physical density finding. Its purpose remains a separate archaeological question. No alien technology, secret treasure or previously unseen inscription is demonstrated by the measurement.",
      "status": "Assessment with explicit limits",
      "refs": [
        "P1"
      ]
    },
    {
      "text": "The map point represents the exact location of every reported event.",
      "status": "Incorrect; orientation only",
      "refs": []
    }
  ],
  "hypotheses": [
    {
      "title": "A construction-related architectural space",
      "status": "Candidate function",
      "support": "A real low-density region is compatible with structural design.",
      "limits": "The measurement does not identify its intended use.",
      "test": "Compare geometry with independently documented construction features."
    },
    {
      "title": "A chamber with an unknown purpose",
      "status": "Candidate description",
      "support": "A substantial space is indicated.",
      "limits": "Chamber layout and contents are not established here.",
      "test": "Seek additional non-invasive measurements before defining an interior."
    }
  ],
  "tasks": [
    {
      "title": "Audit the source record",
      "body": "Retrieve the named records for Khufu’s pyramid: what muons reveal and what they do not. Record author, edition, page or section and access date. Treat a catalogue, mirror or translation of one document as the same evidence, not independent corroboration."
    },
    {
      "title": "Build the dated evidence ledger",
      "body": "Read the detector geometries and controls before interpreting a visual reconstruction. Separate measured paths from modelled boundaries. Compare structural explanations with established architecture, and mark any proposed access route or contents as unknown unless a later direct observation documents them."
    },
    {
      "title": "Test the interpretation",
      "body": "Compare geometry with independently documented construction features. Seek additional non-invasive measurements before defining an interior. Record what would favour or weaken each explanation; leave unperformed work marked as proposed."
    }
  ]
}